Demographics · MO
St. Louis, MO demographics: 288,512 residents, with a median age of 36.8 years, from the U.S. Census Bureau's American Community Survey 2020–2024 (5-year estimates).
288,512 people live in St. Louis, at a median age of 36.8 years (American Community Survey 2020–2024, a 5-year average)
Median age 36.8 years — younger than the U.S. median of 38.9.
ACS 2020–2024 5-year · ACS 5-Year Estimates 2020-2024 (released 2026-01-29)
In St. Louis, the largest race group is White (45.5%); 5.3% of residents are Hispanic or Latino (of any race); 7.1% were born outside the United States.
ACS 2020–2024 · B01001 / B01002
The median age in St. Louis is 36.8 years (±0.2), younger than the U.S. median of 38.9 years. The population is 48.5% male and 51.5% female. The largest age band is 25 to 34 at 19.7%.
| Age band | People | Share | ± margin |
|---|---|---|---|
| Under 5 | 16,420 | 5.7% | ±28 |
| 5 to 17 | 36,450 | 12.6% | ±1,248 |
| 18 to 24 | 24,957 | 8.7% | ±1,062 |
| 25 to 34 | 56,774 | 19.7% | ±54 |
| 35 to 44 | 41,939 | 14.5% | ±1,313 |
| 45 to 54 | 31,814 | 11.0% | ±180 |
| 55 to 64 | 35,451 | 12.3% | ±1,232 |
| 65 to 74 | 28,824 | 10.0% | ±1,197 |
| 75 and over | 15,883 | 5.5% | ±820 |
Median age by sex: 36.3 (male) · 37.3 (female).
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B01001 sex by age, B01002 median age) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B02001 / B03003
The largest race group in St. Louis is White at 45.5% of the population. Separately, 5.3% of residents are Hispanic or Latino of any race. Race and Hispanic origin are two different questions on the census form, so their shares are reported separately and are not additive.
| Race (alone, or two or more) | People | Share | ± margin |
|---|---|---|---|
| White alone | 131,235 | 45.5% | ±616 |
| Black or African American alone | 121,932 | 42.3% | ±1,090 |
| American Indian & Alaska Native alone | 723 | 0.3% | ±258 |
| Asian alone | 10,200 | 3.5% | ±332 |
| Native Hawaiian & Pacific Islander alone | 77 | 0.0% | ±78 · low precision |
| Some other race alone | 5,695 | 2.0% | ±860 |
| Two or more races | 18,650 | 6.5% | ±1,335 |
| Hispanic or Latino (of any race) | 15,297 | 5.3% | n/a |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B02001 race, B03003 Hispanic or Latino origin) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B11001 / B25010
St. Louis has 144,891 households. 41.8% are family households and 48.0% are people living alone. The average household holds 1.92 people.
Total households
144,891
ACS 2020–2024 5-yr · B11001
Avg household size
1.92
ACS 2020–2024 5-yr · B25010 · ±0.02
Family households
41.8%
Share of all households · B11001
Living alone
48.0%
Share of all households · B11001
| Household type | Households | ± margin |
|---|---|---|
| Total households | 144,891 | ±1,211 |
| Family households | 60,511 | ±1,649 |
| Nonfamily households | 84,380 | ±1,715 |
| Householder living alone | 69,545 | ±1,835 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B11001 household type, B25010 average household size) · place-grain · methodology →
ACS 2020–2024 · B05002 / C16001
7.1% of St. Louis residents were born outside the United States. 90.6% of residents age 5 and over speak only English at home. The most-spoken non-English language at home is Spanish (3.2%).
| Measure | Value | Source / grain |
|---|---|---|
| Foreign-born share | 7.1% | 20,450 people · B05002 |
| Speak only English at home (age 5+) | 90.6% | C16001 |
| Top non-English language at home | 3.2% | Spanish · 8,738 speakers · C16001 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B05002 place of birth, C16001 language spoken at home) · place-grain · methodology →
ACS 2020–2024 · B15003
41.1% of adults age 25 and over in St. Louis hold a bachelor's degree or higher (the U.S. share is about 35%).
| Measure | Value | Source / grain |
|---|---|---|
| Bachelor's degree or higher (age 25+) | 41.1% | B15003 lines 22–25 over line 1 · place-grain |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B15003 educational attainment, population 25+) · place-grain · methodology →
Sources · provenance
The GEOID for St. Louis is 2965000. Every figure on this page is a place-grain American Community Survey 5-Year 2020–2024 estimate (ACS 5-Year Estimates 2020-2024 (released 2026-01-29)) shown with its margin of error. Full per-dataset detail: /sources/.